- Weight - 5lb 8oz. on Medium Xcurve, bag only weighs 2lb 7oz.
- 5,400 cubic inch main bag
- 4,300 cubic inch bivy-mode
- Hydration compatible
- Full panel zip for access to the main bag
- Front zipped pocket for quick access to essentials
- 150+ pound load rating
- Hydration compatible (Hydro Sleeve - Sold Separately)
- 2,500+ cubic inch expandable Load-Shelf
- Belt attachments
- Heavy-duty YKK #10 zipper
- Cordura 500 and Xpac fabric
- Heavy-duty, 1" Duraflex military approved buckles and webbing
- Made in the USA
WAIST BELT SIZES
Small 28" - 30"
Large 37" +
The Sky 5900 blends function of a front panel zip with the versatility of the proven Sky design. The Sky 5900 weighs 5.55lbs on a Medium Xcurve Frame. The large front panel zip allows quick access to virtually the entire pack while the Sky design offers excellent compression. The Sky 5900 can go from a 4,300 cubic inch bivy mode to a full volume of 5900 cubic inches with the Sky Lid. Add the load shelf volume of 2,500+ cubic inches to bring the overall max volume to 8,000 cubic inches. Anything from day trips to extended trips, the Sky 5900 has you covered.
A 22" front vertical pocket is incorporated for quick access to a spotting scope, sized to fit the largest of glass. Attachment points for Swing Out Pockets are located just inside the zipper for quick access to small items needed along the trail. Large external open-top pockets are located on each side of the pack for the carry of a tripod, water bottle, or the stock of a rifle.
A Load-Shelf is integrated into all of our frames, allowing the user to expand the bag off the frame to pack gear or meat in between the bag and the frame. This eliminates the need to put meat inside the bag and keeps the heaviest of loads more stable and closer to your back for increased comfort.
Selecting a Belt Size
Belt sizes align with average pant waist sizes. If you are on the break between sizes, we suggest ordering the smaller of the two sizes. All belts will fit larger waist sizes, but not smaller than the advertised range. Below is our waist belt sizing chart for reference:
WAIST BELT SIZES
Small 28" - 30"
Medium 31"- 36"
Large 37" +>
Interchangeable bags and Frames
All past and current Stone Glacier bags and frames are interchangeable. This allows you to swap bags on and off your frame for different hunts you may have without requiring the purchase of a whole new bag and frame system. Many Stone Glacier customers own one frame with a smaller day bag, and a larger expedition-sized bag to have a system for day hunts and backpack hunts. When viewing our packs on the website, you will notice a "bag only" purchase option if this is something you are considering.
The overall goal was to build a durable load carrying pack, an ultralight pack without using ultralight materials. Stone Glacier packs are constructed of 500 denier Cordura fabric, X-Pac textiles and heavy duty webbing and buckles. X-Pac is a waterproof, USA manufactured fabric technology that has a tear strength double the military requirements for Cordura 500d and is used in the high stress, high wear areas. Cordura 500d is utilized for the main bag due to its balance of strength, flexibility, and noise reduction. The thread is a heavy duty, military grade UV resistant #92 thread. Buckles are Duraflex Berry Compliant heavy-duty military hardware. In every aspect, the most durable, technical, heavy duty materials were selected.
We spent over 3 years of design and field testing with loads from 70 to 150 pounds without any structural issues to accomplish our goal. Here's how we tried to break the frame...Starting with 1-inch steel plates 13” by 25”, we worked our way up to four plates in the pack. Each plate weighed about 85 pounds, 40 pounds per square foot. When it was time to add the third and fourth plate, we welded the plates together, lifted them with a crane, wrapped the Solo 3300 around the plates, and set it back down on the edge of the welding bench where we could get it on our back. The final load weight was 340 pounds with no damage, failure, or signs of stress. While the goal of testing to failure was not accomplished, the load test did prove the 150 pound plus load rating structurally conservative.
Nitrogen infused foam, X-Pac fabric, Cordura 500d fabric and industrial hook and loop combine to provide a suspension with infinite adjustment and comfort. Using hook and loop for the shoulder harness attachment allows the user to not only dial in the exact height of the harness but change the angle each shoulder strap leaves the frame. This industrial hook and loop is rated at 17 pounds per square inch, 25% greater than standard velcro. Each shoulder strap has 24 square inches of contact, for a shear strength of 408 pounds per shoulder strap equalling over 800 pounds shear strength for both shoulder straps. The ultimate in adjustability and strength. The unique "X", carbon and titanium composite, four stay design transfers load evenly to the hip belt while offering optimum load lifter angles. The load is supported by 12 connection points to the frame via 1" webbing. Our frame systems have revolutionized the standard of pack frame comfort and fitting ability.
All Stone Glacier packs have two ¾” tri-slides to hang our Hydro Sleeve on the inside back panel. The Hydro Sleeve can hold up to a 3-liter water bladder. Once the Hydro Sleeve is installed, simply insert your water bladder into the Hydro sleeve and run the hose out the top. Hydration hoses can then be run through the hydration port found at the top of all Stone Glacier bags and routed down either the left or right shoulder strap.
Made in the USA
All Stone Glacier packs and accessories are proudly made in the USA. Not only do we manufacture our products in the United States but where applicable we also use materials and components that are Made in the USA. Our Head Quarters shop is located in Bozeman, MT where all Stone Glacier products are assembled, inspected, packaged and shipped by Stone Glacier employees.
If you still have questions, please feel free to contact Stone Glacier Customer Service at 406.404.0641 or by email at firstname.lastname@example.org. Our office hours are 8 am - 4 pm Monday - Friday. You can also stop by our showroom located at 608 W Griffin Dr., Unit A, Bozeman, MT 59715.
We offer a "30-Day Money Back Guarantee". You have 30 days from the date of purchase to return any of our products for a full refund or exchange for a different size. Products must still be in new and resalable condition without any physical damage, stains, etc. We suggest upon arrival of your pack you fit it properly, load it with 30lbs - 40lbs and assure it is comfortable, fits properly, and meets your expectations.
Stone Glacier products have a lifetime warranty against defects in material and workmanship. Any issues associated with normal wear and tear can be repaired at a minimal and reasonable charge. Please call or email us at the below contact information for any warranty related questions or issues.
*Please Note: tears, punctures, burns, and damage from dogs or other animals are not covered under warranty but can be repaired at a minimal charge. Additionally, tears, punctures, and burns are not classified as defects in materials.
Phone: (406) 404-0641
When fitting a Stone Glacier Pack, there are three things we look for in a perfect fit. (A) First, we always want the belt centered on the tip of your hip bone. Belt positioning can be altered by adjusting the attachment height of the shoulder straps. (B) Next, we want to make sure the shoulder straps make solid contact with the backside of our shoulders. (C) If a gap is present between the shoulder strap and shoulder, it often can be eliminated by loosening the load lifters. Lastly, we want to aim for the color transition on the shoulder straps (D) to land on, or close to, your collarbone. Placement can be altered with a combination of adjusting the attachment height of the shoulder straps on the frame sheet and loosening of load lifters.